Improvement im locomotives



QTETGE.

PATENT ISRAEL P. MAGooN, oE ST. JOENSRURY, vERMoNT.

IMPROVEMENT IN LOCOMOTIVES.

Specification forming part of Letters Patent No. 117,308, dated July 25, 1871.

To all 'whom it may concern:

Be it known that I, ISRAEL P. MnGooN, of St. Johnsbury, of the county of Caledonia, of the State of Vermont, have made a new and useful invention or Improvement in Locomotive Steam- Engines; and do hereby declare the same to be fully described in the following specification and represented in the accompanying drawing, of which- Figure l is a vertical section of the smoke-box and chimney of a locomotive-engine provided with the said invention. Fig. 2 is a side elevation, and Fig. 3 is a front view of such without the deector, the insulating-chamber, and the outer or main chimney, the figure exhibiting'the water-heating coil and the curved guides, to be hereinafter described.

In such drawing,A denotes the smoke-box, and B its educt or chimney, which is surmounted by a bonnet or cap, C, that serves to deflect the discharged smoke and cinders downward into the outer or auxiliary chimney D. The last-m enti oned chimney is an inverted conic frustum surrounding the inner chimney and its adjuncts, and supported on a base-plate, E, whichencompasses the educt or chimney B. Encompassing the said chimney B is a duplex coil, F, of pipe, composed of a long tube bent around at its middle, as shown at a, so that the halves b 0 may be in parallelism, the whole being subsequently coiled in a helix around the smoke-pipe or chimney B. One branch of the helix is extended downward into the smoke-box, thence out of it at its side, thence along to and opens into a check-valve case, el, communicating with the boiler G. The other branch also goes down into the smoke-box, thence out .its opposite Side, and is to be supposed to be joined to a force-pump connected with the tank of the tender, the same being so that, when thc said force-pump may be in operation, water for supply of the boiler may be forced upward through the turns of one branch of thecoil, and next downward through those of the other branch, and thence into the boiler. The water-heating coil is insulated from the auxiliary chimney by means of a closed chamber or case H, surrounding such coil. The apparatus Shown in my patent No. 101,287, dated March 29, 1870, has been found in practice to be attended with a difficulty, which is remedied by my present apparatus, -as described and represented-#that is, the exhaust steam and the smoke escaping together out of the inner chimney were discharged directly against the water-heating coil surrounded by a frustum open both at top and bottom. As a consequence the coil would soon become wet and coated by the vapor and the carbonaceous particles of the smoke to such an extent as to hinder or prevent it from abstracting heat from the smoke and steam. In my present heating apparatus the Smoke does not impinge against the coil, it being prevented from so doing by the insulator or case H. A pipe, I, leading out of one side of the exhaust-pipe K ofthe smoke-box extends upward and opens into the lower part of the insulating-chamber. Furthermore, another pipe, L, open at its upper end, leads from the upper portion of the Said chamber down into the Smoke-box. and turns upward therein, in manner as shown. From the above it will be seen that a portion of the exhaust steam will be thrown through the pipe I into the insulating-chamber, and will pass up within the same and against the coil and will heat it. From thence the steam will pass out and escape into the smoke-box by the discharge-pipe L, and thus aid in accelerating the draught of the chimney. A pipe, M, for discharge of condensed steam or Water from the insula-ting-chamber is shown as leading out of the bottom of such chamber to the outside of the boiler, and to a convenient position for such water to fall upon the ground. rllhe outer chimney is represented as surmounted by a wire-netting or gauze bonnet, N. Underneath the bottom of the insulator, and extended down to the bottom of the outer chimneyon each of two opposite sides of the inner chimney, is an arched' del'lector or guide, O, formed as represented, there being holes or passages P between the deilectors and through the inner chimney. The purpose of the guides or deflectors O is to direct into the inner chimney the cinders or sparks that may gather in the lower part of the outer chimney, they escaping from the latter through the opening l. For engines in which anthracite coal or coke is used for fuel, the outer chimney, its gauze bonnet, and the deflector on the top ofthe inner chimney will not be needed. The same may be Said with respect to the guides o o, such parts being necessary only for Such engines as use bituminous coal or wood in their furnaces. It will be evident, however, that the deiiector and the/ auxiliary chimney Will be advantageous, causing the smoke and steam discharged from the inner chimney to impinge against the outer surface of the insulator, whereby condensation of the steam in the insulator will be prevented in a measure if not entirely.

I make no claim to any thing, combination, or arrangement of parts described in the United States patent No. 17 ,208, dated May 5, 1857, granted to Peter S. Ebbert. In the said Ebberts apparatus the steam, after passing through the heater containing the Water-pipes and surrounding the chimney, is caused to `flour directly into the atmosphere, Whereas in my apparatus it is conducted by the'pipe L'down into and is dis-Y Y charged into the smoke-box, so as to aid in increasing the draught of the chimney; consequently,

I claim- 1. In combination with the insulator H, the coil F, the pipes I K, the smoke-box A, and chimney B, arranged as set forth, the pipe L arranged to lead from. the upper part ofthe insulator down into the smoke-box, as shown, so as to discharge the Waste steam from the heater directly into the said smoke-box or the chimney, in order to facilitate the draught of the latter.

2. The arrangement of the curved guides O O With the insulator, the main and auxiliary chimneys, and the openings P P, as described.

3. The coil, made in manner as described, Whereby the Water to be heated is caused to pass up in one and down in another helix thereof.V i Y Y Y Y ISRAEL: MAGrQONY Witnesses:

R. H. EDDY, J. R. SNOW. 

